Summary:
This should allow more direct testing of changes without waiting for things to land on github first.
As part of this, to avoid a conflict between the deps that bistro downloads and those used by
the rest of the fbcode builder CI, I've updated the version of gtest used by bistro.
Reviewed By: zertosh
Differential Revision: D13802637
fbshipit-source-id: fd71bfabd2a85f4f63c21b44a1e868f2d293180a
